Hot-air motor



HOT AIR Mo'ron Filed Oct, 4. 1924 -iev l, -Jnsrap'rl 15 Patented Jan.18, 1927.

UNITED STATES JOSEPH KOENIG, OF TWO EHVERS, VISCONSIN.

I-IOTwAIR MOTOR.

Application filed October 4, 1924. Serial No.. 741,634.

This invention relates to hot air motors and although it may be used fora variety of purposes, nevertheless is intended kprimarily as a! toy.

In heat engines it has beenthe usual practice to employ steam and analcohol flame. This, as is well known, is a dangerous expedient and toprovide a toy adapted for yuse for children, it is necessary to providea simpler means for employing the heat for motive power.

Objects of this invention arel to provide a hot air motor which isextremely safe in its operation, which may be either driven by anelectric heater or, if desired, from some other source of heat, whichdoes not require any manipulation of valves o-r other adjustments, whichis free from fragile parts, which employs no valves whatsoever in itsconstruction, and which is of sturdy, rugged and simple designparticularly adapting the device for use as a toy although, as stated,it may be used for other purposes.

An embodiment of the invention is shown in the accompanying drawings, inwhich Figure 1 is a side elevation of the device.

Figure 2 is a horizontal sectional view of the structure shown in Figure1, the section omitting` the crank shaft, cranks and wheels.

The device comprises a working cylinder 1 in which a working piston 2accurately lits. This piston is provided with inwardly directed lugs 3which carry a. pin 4 connected to a pit-man 5, suitable spacing meansbeing employed, as shown in the figure. This pitmanA connects with acrank pin 6 mounted upon a iy wheel 7, such fly wheel being in turnrigidly secured to a shaft 8. It is preferable to provide la pair ofspaced supports 9 for this shaft such supports extending upwardly fromthe bed plate 10. rlhe other end of the shaft 8 is provided with a crankdisk 11 which carries a crank pin 12.

A second relatively large cylinder 13 is provided and its rear end isconnected by mea-ns of a conduit 14 with the rear end of the workcylinder 1. This relatively large cylinder has an inwardly projectingfront end having an end wall 15 and a cylindrical wall 16 spaced, asshown, from the wall of the cylinder 13, as may be clearly seen fromFigure 2 to provide a more extended heating surface. The portion of thecylinder 13 at the front end and for a material Vdistance rearwardly isprovided with radiating tins or ribs 17 which keep this end of thecylinl integrally and 2 of the drawings) and is adapted to be connectedto any suitable source of electric energy, for instance the lightingcircuit. 1t will be seen that the rear end of the main cylinder 13 isthe hot end thereof.

A piston rod 23 projects through the wall 15 and preferably through astuiiing box 2li. The rear end of this piston rod slides within a smallsleeve 25formed as a continuation of the wall 18. If desired, thissleeve may be provided with a rear end provided with a small aperture 26to permit the escape of air,

confined between the end of the rod 23 and the vend of the sleeve 25,suitable grooves 27 being provided in the piston rod to prevent loss ofgases from the main cylinder 13. This piston rod 23 is connected bymeans of a pitman 28 with the crank pin 12 and it will be noted that thecrank pin 12 is set 90 from the crank pin 6. The piston rod 23 carries aheat insulating piston 29 which in turn carries a cylindrical memberprovided with forwardly and rearwardly eX- tending portions 3() and 31,respectively. These portions tit between the outer wall of the cylinder13 and the inner walls 16 and 19, respectively, although they are freefrom contact with such walls, being bodily supported by the piston rod.3 which in turn is guided at each end, as stated. It is preferable tocarry the cylinders 1 and 13 by means of o-ne or more supports 32projecting upwardly from the base plate or bed plate 10.

Any suitable type of metal may be used in the construction of thisdevice, for instance a cast aluminum member may be used for the cylinder13 and flanges 17 may be formed therewith. Further the end members maybe also of any suitable metal, aluminum lending itself very readily,however, to this construction due to its lightness, cheapness and greatability to radiate and conduct heat. .1t is, however, to be distinctlyunderstood that other metals may be employed and that the mechanicalconstruction, as illustrated in the drawings, may be changed withoutdeparting` from the spirit of this invention.

In opera-tion, assuming that the parts are in the positions shown in thedrawings, and the working` piston 2 is traveling rearwardly, it will heseen that the air discharged from this cylinder will be shielded fromcontact with the heating;- memher 2O by means of the member 3l ot theinain piston, and that this air will he directed in a sheet towards the'forward end ot the main cylinder, thus hecon'iingl chilled as it passesthe cool sur- YFaces thereof and consequently contracting. However, upon'further rotation, the main piston 29 moves 'iorwardiy and displaces theair from the forward end ot' the main cylinderl?, and causes such air topass over the heating nnit 20 thus expanding the air. T he working`piston 2 is now in a position to move outwardly to accommodate this eX-panded air. This cycle of operation continues indefinitely as lonl asheat is supplied the rear end of the main cylinder.

It will be seen, therefore, that a very simple type of heating`invention has been provided which is free 'rom valves, delicate partsand mechanism, which is not likely to get out .of order, which isextremely simple in its construction and operation, and which may hecheaply manufactured.

Although the invention has been described in considerable detail, it isto be understood that the invention may he variously einbodied and is,therefore, to be limited only as claimed.

I claim:

A toy comprising a crank shaft having a pair o1 cranks thereon, .aflywheel carried by said shaft, a working,` piston connected to one ofsaid cranks, a working cylinder enclosingl said piston, an airconditioning cylinder, a. detiector mounted therein and consisting oit adisc like member ot heat insulating` material and provided with ametallic cylindri al shell spaced .trom the inner wall of said aircoinditioning cylinder, a piston rod carried by said delector, a linkconnectmg said piston rod and the other of said cranks, said airconditioning` cylinder having a recessed front end provided with meansfor conducting;` heat away from such end, said air conditioning cylinderhaving a recessed rear end spaced inwardly o't' said cylindrical shelland an electric heating element surrounding` such inwardly recessed rearend and mounted within the interior of said cylinder, said recessed endsformingsupports or said piston rod, and a pipe connecting said airconditioning cylinder with said working cylinder.

ln testimony that l claim the foregoing` I have hereunto set my hand atTwo Rivers, in the county of Manitowoc and State of lVisconsin.

JOSEPH KOENIG.

